In microcontact printing, selective contact between the substrate and the micro- or nano-scale features on the stamp results in transfer of a molecular or fluid ink. The proposed layered stamp alter layer optical properties. Transmission of UV light generates a high-contrast image of the printing zone, a region of conformal contact between the patterned stamp and the impression surface. The clear visibility of the contact areas allows continuous (in-line) inspection of the printing process, and hence greater active control capabilities to meet rapidly increasing resolution demands of micro / nano printed substrates.
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